I figured it was an ORV copycat thing. Ever since Omniscient Reader’s Viewpoint got popular, and rightly soon, it’s all been “Constellation this” and “Constellation that.” This comic is unusual in that there were only three to show up so far.
Edit: to add to what I was saying, Constellations, at least according to ORV, are essentially myths or legends that have become powerful in their own right. So famous historical figures become constellations. The Monkey King is a constellation. Greek gods become constellations. Uriel is a constellation, etc., etc. Of course, likely every comic has different criteria for what makes a constellation. I was reading one comic a year or two ago where it was the MC’s parallel timelines selves who were constellations.